[PATCH v3 3/3] cpufreq/amd-pstate: Show a warning if missing EPP tunings

[Mario Limonciello]

From: "Mario Limonciello (AMD)" <superm1@xxxxxxxxxx>

EPP tunings are going to be more important going forward.  Show a warning
if on a heterogeneous platform without them.

Suggested-by: Christian Ludloff <ludloff@xxxxxxxxx>
Signed-off-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>
---
 drivers/cpufreq/amd-pstate.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 380294bb56cd7..ae6caef389bd7 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -2376,8 +2376,12 @@ static void __init amd_pstate_init_epp_values(void)
 	const struct x86_cpu_id *id = x86_match_cpu(amd_pstate_epp_soc_ids);
 	const struct amd_pstate_epp_soc *soc;
 
-	if (!id || !id->driver_data)
+	if (!id || !id->driver_data) {
+		if (cpu_feature_enabled(X86_FEATURE_ZEN6) &&
+		    cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES))
+			pr_warn_once("No EPP tunings found for platform\n");
 		return;
+	}
 
 	soc = (const struct amd_pstate_epp_soc *)id->driver_data;
 
-- 
2.43.0